What is a name for repeating pattern in music?

A repeating pattern in music is often referred to as a "riff" or "ostinato." A riff typically consists of a short, catchy sequence of notes or chords that is repeated throughout a song, while an ostinato is a musical phrase that persistently repeats in the same voice, often serving as a foundation for variations or improvisation. Both elements are commonly used in various genres to create a sense of continuity and familiarity.